Answer this question truthfully
### Question: What causes nausea and vomiting?
### Response: Many common problems may cause nausea and vomiting:
Food allergies Infections of the stomach or bowels, such as the "stomach flu" or food poisoning Leaking of stomach contents (food or liquid) upwards (also called gastroesophageal reflux or GERD) Medications or medical treatments, such as cancer chemotherapy or radiation treatment Migraine headaches Morning sickness during pregnancy Seasickness or motion sickness Severe pain, such as with kidney stones
Nausea and vomiting may also be early warning signs of more serious medical problems, such as:
Appendicitis Blockage in the intestines Cancer or a tumor Ingesting a drug or poison, especially by children Ulcers in the lining of the stomach or small intestine